I'm pretty much of the opinion that if people want a season ticket, they'll buy one regardless of advertising. Likewise, if they don't want one, then they''ll ignore all persuasion and incentives (pricing apart) put before them.
A football related audience is actually quite similar to your normal brand devotees away from sports. Take our cousins across the city for example. Their chairman has been somewhat proactive in getting the crowds in. He's listened to sty regulars and levered numerous marketing channels to shout about the changes he's implemented. Their crowds have hardly changed despite the 'feel good' mood that he's created. Even if they're silly enough to agree to the Club9 proposed investment, I don't think that would make much of a difference considering how disenfranchised their supporters have become.
The only real way to persuade the majority of supporters to part with the hard earned cash is through the product on the pitch.